Re: Trouble getting Logic OMAp35x modules to boot

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On Tue, Nov 23, 2010 at 7:50 AM, Peter Barada <peterb@xxxxxxxxxxx> wrote:
> I've pulled the latest linux-2.6.37-rc3 kernel from kernel.org, and using
> the arch/arm/configs/omap3plus_defconfig as .config, and turning on:
>
> CONFIG_MACH_OMAP35CONFIG_MACH_OMAP3530_LV_SOM=y
> CONFIG_MACH_OMAP3_TORPEDO=y
>
> to run on the Logic OMAP35x boards, it failed to boot (no output from the
> serial console).
>
> I added:
>
> CONFIG_DEBUG_LL=y
> CONFIG_EARLY_PRINTK=y
>
> to turn on early debigging (and adding earlyprintk to the command line), and
> see all looks fine up to the end of:
>
> Starting kernel ...
>
> Uncompressing Linux... done, booting the kernel.
> Linux version 2.6.37-rc3-svn12998 (peter@blitz) (gcc version 4.3.3 (Sourcery
> G++
>  Lite 2009q1-203) ) #5 SMP Mon Nov 22 17:09:07 EST 2010
> CPU: ARMv7 Processor [411fc083] revision 3 (ARMv7), cr=10c53c7f
> CPU: VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
> Machine: Logic OMAP3 Torpedo board
> debug: ignoring loglevel setting.
> bootconsole [earlycon0] enabled
> Memory policy: ECC disabled, Data cache writeback
> OMAP3430/3530 ES3.1 (l2cache iva sgx neon isp )
> SRAM: Mapped pa 0x40200000 to va 0xfe400000 size: 0x10000
> On node 0 totalpages: 65536
> free_area_init_node: node 0, pgdat c05450a0, node_mem_map c0579000
>  Normal zone: 512 pages used for memmap
>  Normal zone: 0 pages reserved
>  Normal zone: 65024 pages, LIFO batch:15
> PERCPU: Embedded 7 pages/cpu @c077c000 s4928 r8192 d15552 u32768
> pcpu-alloc: s4928 r8192 d15552 u32768 alloc=8*4096
> pcpu-alloc: [0] 0
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024
> Kernel command line: display=15 console=ttyS0,115200 root=/dev/nfs rw
> nfsroot=19
> 2.168.3.5:/opt/nfs-exports/ltib-omap,wsize=1500,rsize=1500 ip=dhcp
> no_console_su

...

> io scheduler noop registered
> io scheduler deadline registered
>
> where the output turns to trash on the serial console.
>
> 1) Is omap2plus_defconfig the default kernel configuration I should use for
> the Logic OMAP35x boards?
> 2) If so, any suggestions on where/why the console serial port is going
> south?
>

If you have CONFIG_SERIAL_OMAP enabled (which should be enabled with
the omap2plus_defconfig, then the serial port would now be ttyO0 instead
of ttyS0. Try changing this.

- Anand
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